ラベルの生成

var roomNameLabel = makeLabel(CGRect(x: 0,y: 0,width: 200,height: 50), text: roomNameDisplay, size: 24, color: UIColor.gray)
roomNameLabel.layer.position = CGPoint(x:screenWidth – 120, y:75)
self.view.addSubview(roomNameLabel)

func makeLabel(_ frame: CGRect, text: String, size:CGFloat, color:UIColor) -> UILabel {
        let label = UILabel()
        label.frame = frame
label.backgroundColor = UIColor.white
        label.text = text
        label.font = UIFont.systemFont(ofSize: size)
        label.textColor = color
        label.textAlignment = NSTextAlignment.center
        label.lineBreakMode = NSLineBreakMode.byWordWrapping
label.numberOfLines = 0
        label.layer.borderWidth = 1.0
        label.layer.borderColor = UIColor.black.cgColor
        return label
}